A268951 - cp's OEIS frontend

A268951 Number of growing tree trajectories (T(1),T(2),...,T(n)), where T(k) is an unlabeled tree on k nodes and T(k) can be obtained from T(k+1) by deletion of a leaf.

n	a(n)
1	1
2	1
3	1
4	2
5	4
6	13
7	48
8	235
9	1297
10	8628
11	63902
12	538454
13	4973090
14	50621738
15	557399709
16	6636723151
17	84584674076
18	1151419603932
19	16640050320703
20	254656634876886
21	4110614617328251
22	69818868005928116
23	1244251510078579731
24	23216586390303085622
25	452567906988785409009

[1, 1, 1, 2, 4, 13, 48, 235, 1297, 8628, 63902, 538454, 4973090, 50621738, 557399709, 6636723151, 84584674076, 1151419603932, 16640050320703, 254656634876886, 4110614617328251, 69818868005928116, 1244251510078579731, 23216586390303085622, 452567906988785409009]

cp's OEIS Frontend

A268951 Number of growing tree trajectories (T(1),T(2),...,T(n)), where T(k) is an unlabeled tree on k nodes and T(k) can be obtained from T(k+1) by deletion of a leaf.

Table of values

List of values